Pyongyang,

Kim Jong Thae DK4

Nr. 415

Reverse engineered Changchun DK4 produced by Kim Jong Thae, with one intermediate cabless motor car. The set was named "Yonggwang-ho".
Note that the Changchun DK4 did not orginally have intermediate motor cars.
Eventually, another motor car with cab was added to the consist.

Currently, the set has been sent to work on the Korean State Railway, with the two motor control cars split into two sets: 1206 and 1305, both coupled with one locally-produced motor car and one original Changchun DK4 car.
Images: https://i.imgur.com/9dyeuu1.jpg https://i.imgur.com/V2cA09m.jpg and information from twitter user @Kawaishi_Kanae


Source: Rodong Sinmun, 1992/6/1